Is there any way to make the spacebar a hotkey for the OK function.  For example when trying to add any feature, an extrude for example, you enter all of the contraints in the property manager then have to click on the checkmark to accept everything.  I want to be able to use the spacebar to click any checkmark that I would usually click with the mouse.

I've tried customizing the hotkeys but don't seem to see an option to add a hotkey for this.  Any suggestions?